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What is the side length of a square with an area of 20 square centimeters? Answer with primary school knowledge
Let the side length of a square be x cm
xx=20
According to the multiplication formula: 446, 5525. The answer should be between 4cm and 5cm
The area of a square is 640 square meters. If the side length of the square is reduced by 2 times, the square will be the same as it is now
160
As shown in the figure, the sum of the side lengths of the two squares is 20 cm, the difference between the area of the two squares is 40 cm, and the area of the small square is 20 cm______ Square centimeter
Let the side length of a large square be x cm, and the side length of a small square be y cm. From the meaning of the question, x + y = 20x2 − y2 = 40. By solving the equations, x = 11y = 9, the area of a small square is 9 × 9 = 81 (square cm). Answer: the area of a small square is 81 square cm. So the answer is: 81
The size of two squares, the side length of 20 cm, the difference between the area of 40 square centimeters, small square area
Let the length of a small square be X
（20-x)*(20-X）-X*X=40
X=9
9 * 9 = 81 square centimeter
As shown in the figure, the sum of the side lengths of the two squares is 20 cm, the difference between the area of the two squares is 40 cm, and the area of the small square is 20 cm______ Square centimeter
Let the side length of a large square be x cm, and the side length of a small square be y cm. From the meaning of the question, x + y = 20x2 − y2 = 40. By solving the equations, x = 11y = 9, the area of a small square is 9 × 9 = 81 (square cm). Answer: the area of a small square is 81 square cm. So the answer is: 81
It is known that the sum of the side lengths of two squares is 20 cm, and the difference between their areas is 40 square cm. Find the side lengths of the two squares
Let the side length of a square be x and the side length of the other square be y.x + y = 20. ① x × X-Y × y = 40. ② we get x = 20-y from ①. ③ we get (20-y) × (20-y) - y × y = 40 (20 × 20) - (20 × y) + y × Y-Y × y = 40400-40 × y = 40-40
A square has an area of 40 square meters. How long is its side?
40 under the root sign, about 6.3245 meters
A square room has an area of 40 square meters and its side length is between two adjacent integers
Suppose the side length of a square is X. then the square of X is equal to 40. So x = root 40. The square of 6 is 36, and the square of 7 is 42.36 "40" 42, so the side length is between 6 and 7
If the length and width of a square test field are increased by 5 meters, the area will be increased by 875 square meters? Draw a picture first, then answer
The following figure is as follows: the length of the original square is a, and according to the meaning of (a + 5) (a + 5) (a + 5) (a + 5) (a + 5) (a + 5) - A2 = 875, and the following is (a + 5) (a + 5) (a + 5) (a + 5) (a + 5) (a + 5) (a + 5) (a + 5) (a + 5) - A2 = 875, according to the meaning of (a + 5) (a + 5) (a + 5) (a + 5 + 5) - 2 = 875, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & & nbsp; & & nbsp; & nbsp; & nbsp; & & nbsp; & & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & & nbsp; & nbsp; & & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; &A = 850 ／ 10, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; a = 85.85 × 85 = 7225 (M2). A: the original area of the test field was 7225 m2
If the length and width of a square test field are increased by 5 meters, the area will be increased by 875 square meters? Draw a picture first, then answer
The drawing is as follows: let the length of the original square be a. according to the meaning of the title, we get (a + 5) (a + 5) - A2 = 875, & nbsp; & nbsp; & nbsp; A2 + 10A + 25-a2 = 875, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 10A + 25 = 875, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp
RELATED INFORMATIONS
- 1. If the length and width of a square test field are increased by 5 meters, the area will be increased by 875 square meters? Draw a picture first, then answer
- 2. A square, the side length increases 1 cm, the area increases 17 cm, how much is the original square area
- 3. If one side of a square is increased by 2cm and the other side by 1cm, the area of the rectangle is 14cm2 more than that of the square, then the length of the original square is______ cm．
- 4. If one side of the rectangle is x and the area is y, y is expressed as a function of X
- 5. It's a rectangular gift box. It's 18cm long, 15cm wide and 20cm high. Label paper is pasted around it. What's the area of the label paper at least
- 6. A cuboid becomes a cube when its length increases by 5cm, and its surface area increases by 160cm2. What is the volume of this cuboid? I'm in a hurry. I'm looking for a master
- 7. A cuboid wood block, cut from the top of the cuboid 5 cm high, the rest is a cube, the surface area reduced by 120 square centimeters______ Cubic centimeter
- 8. A cuboid wood block, cut 5 cm from above, becomes a cube, its surface area is reduced by 160 square cm. Calculate the volume of the original cuboid
- 9. After two cubes are put together into a cuboid, the surface area is reduced by 162 square centimeters, and the surface area and volume of the cuboid are calculated
- 10. A rectangular block of wood, cut from the upper and lower parts of the cuboid 3 cm and 2 cm high, will become a cube, the surface area reduced by 120 square meters Centimeter, what's the original volume? It's very detailed. No equation,
- 11. The perimeter of a square paper is 36 cm. How many small squares with an area of 1 square centimeter can fill this paper
- 12. There are two squares, one big and the other small, whose perimeter differs by 20 cm and area by 55 square cm. What is the area of a small square?
- 13. The circumference of the bottom surface of a cylinder is 15.7 cm, and the side area is 62.8 square cm
- 14. The perimeter of a square is 16 decimeters. If its side length is doubled, then its perimeter is 16 decimeters______ Decimeter, area is______ Square decimeter
- 15. Fold a 24 cm square paper in half four times to get a small square. What is the area of the small square______ Square centimeter
- 16. A cuboid with a square bottom is just a square after unfolding its side. The surface area of the cuboid is The surface area of a cuboid is () times that of a bottom area
- 17. The aspect ratio of the cuboid is 3:2:2, and its surface area is 168. In the surface area of the cuboid, several sides are square, and what is the area of the square
- 18. The minimum surface area of the cube is () cm
- 19. Three cuboids, 3cm long, 2cm wide and 1cm high, are used to form a large cuboid with the smallest surface area. What is the surface area of this cuboid in square centimeter?
- 20. Use 16 square paper with 1cm side length to make a rectangle and a square. How to make the perimeter of the figure shortest